SU1303439A1 - Ribbon-driving mechanism - Google Patents

Description

3. The mechanism according to claim 1, characterized in that in the gear wheel 18 there is an annular groove for guiding the last turns

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The invention relates to a tape drive mechanism for typewriters or similar office equipment, which enables the use of various colors and their tapes to choose from.

From DE-OS 2 731 607 and 2 731 593 a mechanism is known for switching the direction of movement of the tape, which requires only slight efforts to stretch the colors of the tape tape to provide a reverse and which, despite their simple design, requires only one direction. engine rotation.

DE-AS 1 561 238 describes a stepping mechanism for drawing a dyeing tape, which, despite its location on the letter carriage moving parallel to the stationary paper support roller, ensures proportional pitch and maximum utilization of the dyeing tape. From DD WP 128987, a tape-moving mechanism is known, the transmission design of which allows the various drawing paths to be implemented in accordance with the dye tape used.

This is achieved by the fact that the drive of the machine through an intermediate gear affects the transfer of the dye belt draw, which is subdivided into two output gears with drive wheels with different angular speeds.

One of these two drive wheels, when the tape cassette is installed through the drive teeth, engages with one of the two tape rollers located in the cassette. In this case, the lead teeth are located only on the tape roller, which, in accordance with the required step width of the laid tape, should be coupled with the drive wheel corresponding to this step width. One of the gears of the transmission is connected via a resilient belt drive to a drive wheel assigned to the winding coil, so that when the belt drive is forced to slip due to the constantly changing winding diameter, the dye tape can be wound tight. The other gear wheel can be rotated manually in a certain direction so that after inserting the cassette the ink ribbon can be tight.

To realize different angular speeds for pulling and winding the ribbon, as well as manually turning the flutter spring 21 and the hole 18.1 for hanging the bend 21.1 of the loop spring 21.

there is the presence of a complex transfer located in the letter carriage, which can be connected to the machine drive only through an additional gear and other

mechanical elements, since the tape drive motion controlled by the disk cam is matched to a specific width of the dye tape, the use of cassettes on which other types of tapes are wound is excluded, and this tape-moving mechanism cannot also be expanded by adding a correction mechanism without installing a separate drive-driven mechanism with appropriate tape guiding elements.

DE-OS 2164748 presents a correction mechanism, in addition to a stepping mechanism for tape cassettes made in a known manner. In this case, the correction tape is pulled by means of a driving gear wheel acting directly on the reel of the correction tape, turned by a spring-loaded dog, which is thrown by means of cams. To correct a typo, the ribbon in a separate correcting guide is lifted to the printing position with the help of a separate device, so that when you strike again in a known manner, the incorrectly applied ink is removed from the data carrier. To pull the correction tape in the opposite direction, the winding coil is exerted by a resisting force of rotation, namely, by the elastic interaction of the spring latch with the wheel of the ratchet-pull reel.

5 A disadvantage of this device is that it requires extremely high mechanical costs for controlling the pulling, braking and lifting mechanisms of the printing carriage, as well as for transferring energy from a powered machine.

A drive mechanism for tape cassettes is described in DE-OS 2509 839, in which a stepper motor drives a first system of gear wheels, which is coupled directly to a cassette driving roller, and which includes an electromagnetic friction clutch, which moves through 5

What is disadvantageous.

zhodnoe wheel drive gear winding coil. This drive gear of the winding coil again covers the direct drive for transmitting the torque to the winding coil.

In this solution, a relatively complex mechanism transforms, using an electromagnetic friction clutch, a constant torque of the drive roller at the moment of rotation, with a corresponding slippage potential on the winding roller.

Such a drive mechanism has the disadvantage that its effect on the tape cassette is limited, since expanding its capabilities, for example, to perform other functions using the same electric drive, would require too high mechanical costs, and since the necessary mechanisms would have too large overall dimensions dimensions for mounting in the print carriage.

The purpose of the invention is to improve the performance properties of typewriters or similar office equipment by equipping them with a tape-moving mechanism, which, at low technical cost, allows the use of a large number of different dyeing and / or correction tapes in a selective way.

The invention is based on the task, eliminating the drawbacks of the known solutions, to create a tape-moving mechanism, rationally manufactured with a small expenditure of technical means, with a central drive and allowing the use of dyeing and correction tapes of all types, sizes and magazine loads.

This task is solved in that wide or narrow tape cassettes are mounted on supporting trunnions, including the rotational movement of the stepper motor in accordance with the inserted tape, which is transmitted to the dye tape by an electric motor equipped with a gear wheel through a gear wheel through a gear wheel, a cap and a lead on a tape roller and at the same time, through a slip that slides down onto a winding device, and which, for drawing a correction tape, of gearing, reversible mechanical coupling and the gearing is transmitted to the coil core, the stops prevent the targeting a return belt, and a spring-loaded lever surmounted angular rotational torque for tensioning the belt acts on the spool is unwound.

An exemplary embodiment of the invention is explained in more detail on the basis of drawings, which are limited to a schematic representation of the main parts of the belt-sliding mechanism according to the invention.

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FIG. Figure 1 shows the tape transfer mechanism, including tape directors, top view; in fig. 2 - section .-. in fig. I.

On the plate 1, which is located on the frame of the pie carriage not shown in the drawing, screws 3 strengthen the stepper motor 2. The pin 4 on the hollow wa.ch of the engine 2.1 fastens the gear wheel 5. On the nozzle 5.1 of the gear wheel 5, with the locking side by means of the puber 7 and a snap ring 8, by means of screws 9, is fixed a gear wheel 6 centered on the shoulder of the cap 10. The cap 10 has a slot 10.1 in which the leash 11 is directed, the cylindrical protrusion 11.1 of which moves along the axis in the hollow shaft of the engine 2.1 under the action compression springs 12. The spring 13 is hung with its bend 13.1 into the hole 6.1 of the gear 6 and connects this wheel to the wheel 5. The spring 14, which consists of an extension spring branch, the conically wound end of which is geometrically inserted into its cylindrical end, moves into keyway 10.2 of the cap 10. The gear wheel 6 engages with a gear 15 fixed to the rivet with the notch 16. A loop spring 1 7 encompasses the protrusion 15.1 of the rivet with the neck 15 and the shoulder 16.1 of the gear 16. The gear 5 engages with the tooth This wheel 18, which rotates around the bolt 19 screwed onto the plate 1, on which the gear wheel 20 is also mounted. The gear wheel 20 engages with the gear wheel 23 mounted on the rivet with the neck 22. The loop spring 24 engages the rivet lip 22.1 with neck 22 and shoulder 23.1 gears 23. Through the gear wheel 23 on the rivet with neck 22 supports the locking lever 25, under the influence of the coil spring 26 and adjacent to the stop 1.1 plate 1. On a hollow rivet with a neck 27 sec. e stop ring 28, the wheel 29, in ishonoch- hydrochloric groove 29.1 which moves rod 14. The cap 30, fastened with screws 31 to the wheel 29 (FIG. 1) has a guide slot 30.1 for a driver 32, the tongue 32.1 of which can move axially in the hollow pin rivet 27 under the influence of the compression spring 33. The compression spring 33 rests on the wheel 29 through the washer 34.

On the frame of the lettering carts not shown here, another plate 35 is fastened, on which two bearing pins 36 with protruding bearing surfaces of the collar 36.1 and 36.2 are located. The drawing shows only one of the two supporting pivots 36. Rotating on the rivet with the neck 37, toothed, spring-loaded tension spring 38 (Fig. 1), the angular lever 39

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engages with a gear wheel 40 having a shoulder 40.1 and installed with locking from axial displacement on a rivet with a neck 41. The range of rotation of the angle lever 39 is limited by the length of its gear edge 39.1. With two angles 35.1 bent away from the plate 35.1, of which only one is shown, the elastic holder of the cassette 42 and the support 42.1 are connected by rivets. The cassette holder 42 through the cover 43.1 captures the tape cassette 43, which by its base 43.2 rests on the shoulder 36.1 of the trunnion 36. The cover 43.1 and the base 43.2 of the tape cassette 43 are supported in a known manner and not shown here is a reel of the winding coil, the axle of the winding 5 coil 44 , on which the core of the coil 45 with the used part of the ink tape 46 is mounted, one tape roller 47 and one pressure roller 48 adjacent to it. The drive pin of the winding coil 44 and tape roller 47 have on the lower ends One slot each 44.1 and 47.1, which includes the leads 32 and 11. The dashed lines indicate the base of the tape cassette 49, which is intended for iridescent tapes, resting on the shoulders 36.2 of the trunnion 36, otherwise it is a similar design of the shown tape cassette 43.

The core 50 of the take-up coil of the correction tape 51 is firmly twisted on the gear wheel 40, and the correct tape 52 is wound on the winding coil 53, which with its core 54 is mounted on the spacer bolt 19 and fixed by a locking lever 25, with the end teeth 54.1 of the coil core 54 entering the mating engagement 54.1 of the core of the coil 54 engages the mating engagement 20.2 of the gear wheel 20. The tape 46 and the correction tape 52 are guided in a known manner by tape drivers not shown here and can mats to choose from in the appropriate position.

The principle of the mechanism is as follows.

When mounting the tape cassette 43, the leads 11 and 32 are consumed by the vehicle, overcoming

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counterclock-wise. A loop spring 13 is twisted to the left and curls at the same time ... with a frictional closure and connects the gear 5 to the gear 6. This rotational movement through the cap 10 is transmitted to the leash 11 and thereby to the tape roller 47, as a result of which the pressure roller 41 moves the color tape 46 horizontally.

The creeping slip 14 transmits with decreasing rotational movement of the cap 10 onto the wheel 29, and the continuously wounding diameter of the dye tape 46 thus matches with the constant feed of the tape roller 47 so that the dye tape 46 can be tightly wound on the core of the coil 45 At the same time, by means of a different wedge angle of the keyways 10.2 and 29.1, it is possible that slippage occurs only on the wheel 28. At the same time, the gear wheel 16 is driven by the gear wheel 6, as a result of which The loop spring 17 spun right to the right and, in addition, a gear wheel 18 is driven simultaneously through the gear wheel 5. This turns the loop spring 21 spun to the left and the torque resulting from the circumferential friction of the loop spring 21 on the gear wheel 20 is eliminated by blocking the action of the curl-shaped loop spring coil to the right through the gear wheel 23, so that the core of the coil 54, which is in the end gear with the gear wheel 20, remains at rest. The use of loop springs 17 and 24 as a directional stop, as compared with a conventional ratchet stop, has the advantage that stopping and continuously drawing paint and / or correction tape do not depend on the engagement pin and is made silently. The last turns of the loop springs 13 and 21 lie in the annular grooves of the gears 6 and 18, so that their unfolding circumference is limited so that the transition from unfolding to curling can be done with minimal backlash. Stepper motor 2 can be switched

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along the axis, the force of the compression springs 12 and 33 and at the time 45 in both directions of rotation and with the differences in their rotation is included in the slots of the leads 47.1 and 44.1, the base 43.2 of the tape cassette 43 lies against the shoulder 36.1 of the trunnion 36, and the holder of the cassette snaps in order to lock the tape cassette 43 through cover 43.1.

Similarly, the process proceeds when fitting the cassette 49 for wide ribbons, the base of which rests on the shoulders 36.2 of the bearing pin 36, but the leash 32 is pressed against the flange 49.1 of the cassette 49 in order to eliminate possible interference. When the dye belt 46 is drawn, the stepper motor 2 through the shaft 2.1 drives the gear 5 connected to the shaft to rotate intermittently

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step value, thanks to which 46 kinds of ink ribbons can be used. The switching is carried out in accordance with the type of ink ribbon 46 used with the aid of a cassette 43, 49, which interacts with a push-button switch, which is not shown here.

The already inserted correcting tape 52 tightens by rotating the core of the coil 54 counterclockwise, with the toothed edge 39.1 of the angular lever 39 rolling on the gear wheel 40 and sliding along it in the form of a ratchet paw if

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counterclock-wise. A loop spring 13 is twisted to the left and curls at the same time ... with a frictional closure and connects the gear 5 to the gear 6. This rotational movement through the cap 10 is transmitted to the leash 11 and thereby to the tape roller 47, as a result of which the pressure roller 41 moves the color tape 46 horizontally.

The creeping slip 14 transmits with decreasing rotational movement of the cap 10 onto the wheel 29, and the continuously wounding diameter of the dye tape 46 thus matches with the constant feed of the tape roller 47 so that the dye tape 46 can be tightly wound on the core of the coil 45 At the same time, by means of a different wedge angle of the keyways 10.2 and 29.1, it is possible that slippage occurs only on the wheel 28. At the same time, the gear wheel 16 is driven by the gear wheel 6, resulting in The loop spring 17 spun right to the right and, in addition, a gear wheel 18 is driven simultaneously through the gear wheel 5. the action of the curl-shaped loop spring coil to the right through the gear wheel 23, so that the core of the coil 54, which is in the end gear with the gear wheel 20, remains at rest. The use of loop springs 17 and 24 as a directional stop, as compared with a conventional ratchet stop, has the advantage that stopping and continuously drawing paint and / or correction tape do not depend on the engagement pin and is made silently. The last turns of the loop springs 13 and 21 lie in the annular grooves of the gears 6 and 18, so that their unfolding circumference is limited so that the transition from unfolding to curling can be done with minimal backlash. Stepper motor 2 can be switched

5 in both directions of rotation and with different

in both directions of rotation and with different

step value, thanks to which 46 kinds of ink ribbons can be used. The switching is carried out in accordance with the type of ink ribbon 46 used with the aid of a cassette 43, 49, which interacts with a push-button switch, which is not shown here.

The already inserted correcting tape 52 tightens by rotating the core of the coil 54 counterclockwise, with the toothed edge 39.1 of the angular lever 39 rolling on the gear wheel 40 and sliding along it in the form of a ratchet paw if

removing the correction tape, the teeth of the toothed edge 39.1 are disengaged.

For pulling off the correction tape 52, the gear wheel 5 rotates in clockwise steps of the shaft of the engine 2.1 clockwise and the gear wheel 18 rotates it counterclockwise. In this case, the coiled-loop loop-wound spring 21 wound in the gear wheel 18 is pulled with a frictional closure and connects the gear wheels 18 and 20.

This stepping rotational movement is transmitted by the end gear 20.2 / 54.1 to the core of the coil 54 and thereby to the winding coil 53, with the result that the corrective tape 52, which is guided in a known manner, moves horizontally. At the same time, the gear wheel 23 is driven clockwise by a gear wheel 20 and the loop spring 24 is twisted to the right.

STANDING the gear wheel 5 clockwise, the loopback spring 13 spun to the left unfolds and the steep friction moment generated on the gear wheel 6 on the gear wheel 6 is eliminated through the gear wheel 16 due to the blocking action of the looped spring 17, which is twisted to the right. As a result, the gear wheel 6 and thus the tape roller 47 remain at rest.

The use of correction tape 52 with appropriate control of the vertical travel of the tape guiding elements is possible in combination with dye ribbons of all types, sizes and magazine load.

It is recognized as an invention according to the results of the examination carried out by the Office for the Invention of the German Democratic Republic.

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Claims (3)

1. MOBILE MECHANISM with a directional rotation-controlled electric motor for stepping the tapes, with two opposing clutches with loop springs, each of which consists of a loop spring with equal ends on the same axis leading the gear wheel, and a clutch with a loop spring for feeding is provided ink ribbon, characterized in that the loop spring 13 of one of the two opposing couplings with a loop spring slides over the nozzle 5.1 of the gear 5 rigidly connected to the motor shaft 2.1 and put The bend 13.1 is attached to the gear wheel 6, which engages with the gear wheel 16, on which the loop spring 17, which is oppositely twisted with respect to the loop spring 13, is fastened, sliding along the protrusion 15.1, which serves as a support for the rivet gear 16, with the neck 15, the loop spring 21 of the other clutch with a bend 21.1 is fixed to the gear wheel 18, which engages with the gear 5, and slides along the shoulder 20.1 of the gear 20, which has a mating engagement for the reeling coil 53 of the correction tape 52 and is engaged e with a gear wheel 23, on which a loop spring 24 is fastened, which is screwed in the opposite direction with respect to the loop spring 21, which slides along the protrusion 22.1, which serves as a support for the rivet gear 23 with the neck 22, for tensioning the correction tape 52 pre-tensioned by a tension spring 38 the angular lever 39 engages with the gear wheel with the gear edge 39.1. 2. The mechanism by π. 1, characterized in that in the gear 6 there is an annular groove for guiding the last turns of the loop spring 13 and a hole 6.1 for hanging the bend 13.1 of the loop spring. fig l 3. The mechanism by π. 1, characterized in that the gear wheel 18 has an annular groove for guiding the last turns of the loop spring 21 and an opening 18.1 for hanging the bend 21.1 of the loop spring 21.